International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 10 Issue: 04 | Apr 2023
p-ISSN: 2395-0072
www.irjet.net
ELECTRODEPOSITION OF Ni-Mg-Zn COATING BY VARYING TEMPERATURE ON MILD STEEL CHAIN AND IT’S SURFACE CHARACTERIZATION, CORROSION AND WEAR PROPERTIES. Dinesh kumar R1, Dineshraj B1, Prashanth P2 1undergraduate scholar, Kumaraguru college of technology, Coimbatore, India, 641006 2Associate Professor I, Kumaraguru college of technology, Coimbatore, India, 641006
----------------------------------------------------------------------------***-------------------------------------------------------------------------ABSTRACT Chrome plating is one of the conventional methods to prevent rust formation on mild steel but the problem with that it is a carcinogenic agent. Alternate materials for the chromium were Nickel, Magnesium, Zinc, Cobalt, and Tungsten. One of the main applications of mild steel was Chain and chain drives which are used in ship anchors, crane lifting, and heavy load lifting. To prevent the occurrence of corrosion on the chain the surface is coated with Ni-Mg-Zn alloy using electro-deposition. Suitable source materials for the alloy coating were identified and their electrolyte optimization parameters were found. Comparative studies of the coating were done at three different temperatures 30 oC, 50oC, and 70oC. Surface characterization of thin films was done with the help of SEM (Scanning Electron Microscopy), EDS (Energy dispersive spectroscopy), and XRD (X-Ray Diffraction), Hardness, Surface roughness, and Wear (Pin on Disc Method). The corrosion behavior of the coated chain is studied with the help of EIS (Electrochemical impedance spectroscopy). Key Words: Chain rusting, Alloy coating, Electrodeposition, Corrosion prevention, Nanotechnology.
1. INTRODUCTION Materials selected for the coating are Nickel, Zinc, and Magnesium. The properties of each of the materials were discussed below. Nickel has good ductile and malleable properties. The melting point of Nickel is 1453 oC and the boiling point is 2913oC. Due to its high thermal stability and poor reaction to acids, it is widely used in the manufacturing of stainless steel and carbon steel. A study on Ni-Zn multilayered alloy coating from an aqueous bath at different current densities 2.0, 3.0, 4.0, 5.0 A/dm 2 reveals that the corrosion property of the material increases to the optimal layer of deposition and then decreases [1]. Zinc is mainly used as the galvanizing agent for mild steel to prevent its surface from corrosion and rust formation. It is a widely used element in the electro galvanizing process and dies casting process. Zinc along with oxide plays a key role in semiconductors and fluorescent lamps. The melting point of Zinc is 420 oC. Steel is used to build the majority of maritime and offshore constructions, which increases the risk of accidents. corrosion deterioration causes The main cause of corrosion is electrochemical processes that lead to the degradation of metals Making a protective barrier is one method of reducing the impact of corrosion application of a barrier creates a defense between the metal and corrosive surroundings metal finishes electroplated. Zinc-based metallic paints To safeguard steel components and structures, cadmium (Cd) and zinc (Zn) are used. via rusting. But any sort of Cd coating, including being a carcinogen and based on cyanide and Cd compounds the usage of Cd is an increasing problem for the environment and health. There are limits to coating. The key metal for galvanic conversion is zinc preventing rust in industrial steel building applications. There are numerous ways to get zinc. Chains have been used in shipping and offshore structures primarily for direct mooring of vessels, such as when they are attached to anchors, and also as dampers in cable mooring, where the chain is primarily at rest on the seabed but acts as a restraint through weight and inertia as the cable is loaded. Most of the time, chains were vulnerable to abrasion from bottom sediments, wear between links and adjacent restraints, and wear between links. They were also susceptible to corrosion, which was known to be particularly bad for chain link components that were subjected to abrasion and wear. Poorly documented data exists regarding chain wear under different conditions and in different climates.
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